I loaded three rounds for a pressure check and this is the result.
They flattened out some, but not too excessive, to my eye, but I'd appreciate others with more experience having a look and voicing their opinion. Recoil does not seem to be more than I am used to. My load is .5 under the max recommended by the powder manufacturer.
Like you said " they flattened out some, but not too excessive ". If they filled out the pocket more I might back off a little but they look ok to me. What is the rifle? How was the accuracy? Rarely is a top load the most accurate
Some of the primers seem to use softer brass and flatten a bit more than others. If you were under a published max load, there was no difficulty extracting, and no other signs of excessive pressure, you shouldn't have any problems.
Bolt extraction was normal. It is a Czech made Mauser, highest quality of workmanship in any Mauser I have ever seen. I wasn't really trying for accuracy and was shooting off a makeshift bench behind my shop. Three shot group was around 2" at 100 yds.. It will be much tighter when I am shooting for accuracy I'm sure.